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2 Sheets-Sheet l.

(No Model.)

L. W.. TRACY. BVAPORATING APPARATUS.

. Patented Peb. 4, 1890.

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2 Sheets-Sheet 2.

' (No Model.)

' L. W. TRACY.v

BVAPORATING APPARATUS.

No. 420,749. Patentedleb. 4, 1890.

N. PETERS. Psmwumowpmr. wnxnngnm n. c.

' UNITED STATES PATENT OEEICE.

LEWIS W. TRACY, OF NEW YORK, N. Y., ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, OF TVVO-THIRDS TO JAMES E. GRANNISS, OF SAME PLACE.

EVAPORATING APPARATUS.

SPECIFICATION forming part of' Letters Patent No. 420,749, dated Februaryd, 1890.

Application filed February 21, 1889 Serial No. 300,670. (No model.)

To @ZZ whom t may concern.- more partitions d. Steam or heating vapor Be it known that I, LEWIS W. TRACY, of is to be admitted at x at one end, and in the New York, in the State of `New York, have irst evaporator of the multiple effect or apinvented certain new and useful Improveparatus may pass out at Each tube e, 5 ments in Evaporating Apparatus, of which through which the heating medium passes, 55,y

the following is a specification. has itsexterior surface irregularly shaped in My invention more especially relates to that such manner as to cause the liquor which class of apparat-us in whichthe cane-juice or is fed or distributed on the tubes to drop other liquid to be concentrated is distributed from them evenly Without running to'one 1o or fed over a bank of heating tubes or pipes, or more separate points on the surface of a 6o the liquid being passed from the bottom of tube and there running off in a stream. To one evaporator to the feed devices of the carry out this part of my invention in what next and the vapor of evaporation from one Ideem the most practical way, I form the evaporator serving as the heating medium in tubes e with annular depressions'e arranged 15 the next. Such a systemis fully disclosed in one alongside of another over the entire sur- 65 an application tiled by me jointly with James face of the tube. These annular channels J. Adams on August 3l, 1888. prevent the lateral running of the liquor, The present invention consists in certain even if the tubes are out of a horizontal plane, improvements, first, in the feed devices, and, and compel it to fall evenly upon the tubes 2o second, in the heating tubes or pipes. below in little 'streams or drops which fall 7o In the accompanying drawings, Figure l is from the annular ridges; or I may form the a side elevation, partly broken away, of one tubes with a close spiral channel e2, as shown evaporator or. effect, Fig. 2, avertical trans# in Fig, 6, and whatever may be the form of verse section of the same; Fig. 3, a perspecthe exterior of the tube that I may adoptthe 2 5 tive view of the feed device; Fig. 4, a transpurpose is toprovide obstructions to the lat- 75 verse section of one of the feed or liquid-diseral running of the liquid and compel it to tributing pipes; Fig. 5, a detail view of a fallina nely-divided state upon the heating,- section of one of the heating-tubes, and Fig. tubes below.

6 a similar view of a portionof a heating- The liquor from the bottom of one evapo- 30 tube having a slightly-different character of rator is taken through a pipe and delivered 8o surface. to the feed devices e of the next evaporator,

The casing or shell of the evaporator is while the heated vapors of evaporation which made up, as shown, of top, bottom, and end pass off at o o are used to heat the next efsections bolted together, and each side therefeet, being admitted thereto at w, a suitable 3 5 of is composed of four like flanged sections vacuumpump being employed, as is Well un- 85 a a a d, bolted together and to the top, end, derstood, to draw the vapors from one evapand bottom sections, as shown. Each side orator to another. section a has a panel b removably bolted in The feeding devices are constructed as folit, and each panel b has one or more glasslows; In the top of each evaporator are one 4o covered peep-holes c. By unbolting and reor more liquor-receiving tanks F, each hav- 9o moving the panels b the heating-pipes and ing in the bottom a transverse well or deinterior of the evaporator are readily accessi pression f, from. the side walls of Which eX- ble for cleaning without distu rbing the main tend channel feed or distributing pipes or framing or sections a of the shell. troughs G-that is, these pipes or troughs are 45 At each end of the evaporator, and bolted open at the top and the liquor overflows and 95 between the end sections and the side, top, falls upon the evaporating-surfaces below. and bottom sections of the shell, is a tube- Generally this construction is shown in the plate d. The horizontal heatingetubes e are joint application above referred. to. carried in these plates, and may, if desired., The present invention consists, first, in

5o be supported between their ends by one or making the troughs G of solid metal chanloo neled or cut, as shown at g, or casting them in such solid shape, as illustrated,for I have found that ordinary piping or tubing, even when v-ery heavy, is liable to warp and discharge the liquor unevenly; second, I notch or scallop the edges of the trough, as shown at 7L, to compel the liquor to overflow in a large number of small streams; third, I form depressions or channels z' in the sides of the troughs extending from the notches h to the under sides of the troughs; fourth, instead of having the channels 'i run around the trough from the notches 71. on one side to those on the other, I prefer to cut a longitudinal channel 7c on the under side of the trough. A large number of points k are thus provided, from which the liquor will run in fine streams.

In practice I should prefer to have the channels z' quite shallow. I should also make the troughs of larger diameter than the evaporating-tubes, and such tubes, instead of being as close together as shown, would be separated by spaces amply sufficient to afford free access to the tubes for cleaning and provide ample space for the expansion of the vapors--that is, they might be from one to two inches apart, and the tubes might be of relatively larger diameter than shown.

There the feed-troughs are cast, the caps g may be cast with them, or they may be screwed ou.

Bothin the case of the feed-troughs and of the evaporating-tubes, the transverse channels for preventing the lateral running of the liquor may of course be much smaller than indicated, and it should be understood that any transverse channeling or roughening which Will accomplish that result is within the terms of my invention.

I claim as my inventionl. In an evaporating apparatus, the combination, with suitable feeding devices, of a gang of evaporating-tubes over which the liquor is distributed, said tubes being formed upon their exterior faces with transverse channels for preventing the lateral ruiming of the liquor, substantially as set forth.

2. The combination, with the liquor-feed tank or receptacle, of the horizontal feedtrough having its overflow edges notched for the purpose set forth, and the horizontal evaporating-tubes upon which the liquor from the feed-trough falls, substantially as set forth.

3. In an evaporating apparatus, the combination, with the evaporating tubes or surfaces over which the liquor is to be distributed, of a feedtrough having transverse depressions or channels upon its exterior, substantially as set forth.

4. In an evaporating apparatus, the combination, With the evaporating tubes or surfaces over which the liquor is to be distributed, of the feed-trough having transverse channels on its exterior and a longitudinal groove along its under side, substantially as set forth.

5. In an evaporating apparatus, the combination, With tubes or evaporating-surfaces over which the liquor is to be distributed, of the feed-trough having its overflow edges notched, transverse channels upon its eXterior face running from said notches downwardly, and the longitudinal groove on its under side, substantially as set forth.

6. In an evaporating apparatus, the combination, with the evaporating tubes or surfaces over which the liquor is to be distributed, of the feed-trough, whether cast or formed by channeling a bar of metal, thel channel of the trough having vertical side walls g and its overflow edges being notched and its exterior formed with transverse chaunels, substantially as set forth. m

In testimony whereof I have hereunto subscribed iny name.

LEWIS W. TRACY. Witnesses:

WM. A. RosENBAUM, EDWARD C. DAVIDSON. 

